Hilariously, if you get the installation manual for say the GTX330 you won't find any reference to "elementary" or "enhanced". This is because these terms are a purely European invention, done without looking at equipment actually on the market.
A GTX330 will radiate all data connected up to its RS232 or ARINC inputs.
This intrigued me enough to trigger some original research. I found the GTX330 to have 2 RS232 inputs, one seems meant to read an altitude encoder, the other might be used for GPS input; and 4 ARINC_429 inputs. It can also read altitude information in the "old style" gray-parallel encoding.
These inputs are not automatically read, they need to be configured; i.e. one must indicate what info is offered on which input.
True enough the manual does not say anything about "elementary" or "enhanced". But is does mention a "diversity" mode, only available in the TX330D model, which requires installing a second antenna on top of the plane - the main one being on the bottom. What is this "diversity" mode? Something USA-specific, perhaps?